books.google.com - Known to mankind since prehistoric times, opium is arguably the oldest and most widely used narcotic. Opium: A History traces the drug's astounding impact on world culture-from its religious use by prehistoric peoples to its influence on the imaginations of the Romantic writers; from the earliest medical...http://books.google.com/books/about/Opium.html?id=8XHV8JAoAi4C&utm_source=gb-gplus-shareOpium